iPad: 500px is a new iPad app that lets you browse some of the web's most interesting and attractive photos, and then use your iPad as a digital photo frame to display your favorites, the best from the 500px community, or your own photos, set to a soundtrack from your iTunes library.

If you're not a member of 500px, you can sign up for free. The community is full of photo fans and other people who just appreciate good photography, and you can add your own shots to your portfolio or just collect photos that you really like into a virtual gallery of great images. The new iPad app, when combined with the web service, gives you an easy and free way to use your iPad as a gorgeous photo frame when its not in use, rotate out those photos as often as you choose, and play music behind them while you work on something else. If you see photos you like, you can share them with friends on Twitter, Facebook, or Tumblr.

500px is free, and available now in the iTunes App Store. Do you have a preferred photo gallery app for iPad? Share your thoughts in the comments.